Respiration-mask.



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BESPIBATION MASK, APPLIUATION Hum MAn.12,19oa.

Patented Nov. 3, 1908.

escasa F. eoonNow, or WAUKEGAN, ILLINOIS.

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Specification of Letters Iatent.

Patented Nov. a, ieo.

Application illed Hatch 12, 190B. Serial No. 420,688.

To all whom it may concern:

Be it known that I, Geenen F. GooDNow, a citizen of the United States,residing in Waukegan, in the county of Lake and State of Illinois, haveinvented certain new and useful Improvements in Respiration-Masks, ofwhich the following is a specification. Those working in or aboutgas-works are often exposed to escaping gas and many a valved port.

My improved mask, while especially intended `for workmen in gas-works,is also suitable for use by firemen and others who are exposed tonoxious gases or vapors of various kinds.

In the accompanying drawings Figure 1 is a perspective view of myimproved respiratlon mask and shows also how it is worn. Fig. 2 is aview of the mask on an enlarged scale in vertical central section. Fig.3 is a perspective view of the mask viewed from the rear.

The bodyortion A of the mask is preferably made o fiexible sheet rubber,that is of substantially hemispherical form, being of such size as tocover the mouth and nose of the wearer and it has a beaded ed e-portionA whichl is hollow and inflata le. The beaded portion is formed with aart a ada ted to fit snugly the brid e of tll'ie nose, whi e the lowerportion a2 ts under the chin and the sides aB fit clsely the cheeks.Preferably the portions aa are somewhat larger in area than the portiona. The hollow beaded ed e may be inflated or deiated by the valvedbranch-pipe B.

A front-plate C is a plied to the outside of the front of the mas and aback-plate D is applied centrally to the rear of the front portionthereof. The plate C is formed with radiall extending arms c, c', some'of which c lie at against the mask while others c are bent outwards toprovide means for attaching the straps v-E which secure the mask to thehead of the wearer; The arms c serve to keep the bodyl of the mask inshape and to hold it firmly in place on the face. The front-plate hastwo apertures and G and the back-glatehas two registering apertures Hand The mask has 'corresponding a ertures between these openings. A coupingy J is secured to the mask at the apertures F, H and through thiscoupling air is admitted tothe mask. As shown, the coupling is L`shapedand has a portion j which passes through the body of the mask andthrough the apertures F, H, and it is shouldered at j to fit snuglyagainst the front-plate and threaded at i2 to receive the threaded partfm of the valvecasing M.

The valve-casing is open at its inner end and at the sides and has avalve-seat m to receive the disk-valve N which is preferably of mica.The arrangement is such that air can be drawn in through the couplingbut cannot be forced outwards therethrough. The coupling J is connectedto a light, flexible hose O which passes over to the back of the wearerand down to the waist where it is connected to a stouter hose P whichshould be of considerable length in order to pass out to the fresh, pureair. The inner end of the hose is supported on a belt Q ap lied to thewearer and at the outer end ci) the hose there is a funnel-shapedreceiver Q through which air can readily enter, especially when thereceiver is turned against the wind.

A valve-casing R is attached to the mask by means of a coupling R whichextends throu h the mask and through the apertures G an Iand thisvalve-casing has a diskvalve S which prevents the entrance of air, gasor smoke but which opens to permit the exhalations'from the wearer ofthe mask to pass out.

Experience has demonstrated that a. mask constructed in accordance withmy lnvenweight of the mask and a comparatively l short, light lenth ofhose which is also partially supporte by the belt. The construction issuch that the mask can be conveniently manufactured and assembled andwhen assembled all leakage is entirely prevented.

It will be observed that the couplings for the valve-casings are clampedagainst the front and rear plates which compress between them the rubbermask proper, thus insuring a packed joint. The arms of the front-plateserve to keep the bod of the mask 1n shape as well as to provi e meansfor attachin the securing straps at proper places to hol the mask firmlyin place.

I claim as my invention:

'A respiration-mask comprising a bodyportion, a front-plate havingradially extending arms bearing against the front of the mask and someof which are bent outwardly, straps attached to the bent arms forsecuring the mask to the face of the wearer, a back-plate within themask and valved entrance and exit couplings applied to said l plates.

In testimony whereof, I have hereunto subscribed my name.

GEORGE F. GOODN OW. Witnesses:

ANNA NIoHoLs GoonNow, CHARLES H. KING.

